Leaking shower head

I've just installed a single handled Pegasus shower valve ( I know, I know...). When I turn it on water comes out of the shower head as well as the spout. Any ideas as to why this is happening and how to fix? Oh! the reason I replaced the whole thing is because the fixture I had before did the same thing.

I've just installed a single handled Pegasus shower valve ( I know, I know...). When I turn it on water comes out of the shower head as well as the spout. Any ideas as to why this is happening and how to fix? Oh! the reason I replaced the whole thing is because the fixture I had before did the same thing.

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What kind of piping did you use between the spout and the shower valve? Also how far is the spout from the valve?

Is the smaller ID of the CPVC causing the problem? Should I replace with 1/2 inch PVC or galvanized pipe. Manufacturer's specs are 8 inch minimum space between valve and spout. Could that be the problem? Kingsotall, it's not a leak, just when I turn on the water it comes out of the shower head and the spout before I pull up the spout shut off (or whatever you call it). When I do that the shower works just fine, no leaks anywhere.

Is the smaller ID of the CPVC causing the problem? Should I replace with 1/2 inch PVC or galvanized pipe. Manufacturer's specs are 8 inch minimum space between valve and spout. Could that be the problem? Kingsotall, it's not a leak, just when I turn on the water it comes out of the shower head and the spout before I pull up the spout shut off (or whatever you call it). When I do that the shower works just fine, no leaks anywhere.

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CPVC is one problem, if the manufacturer states it needs to be 8" away from the valve that is trouble as well. Before making a new hole you can try to pipe it with galvanized real quick and see if it works proper, if not then you need to lower the extra 2" if you can.